At the last minute an accident to my DiL meant we spent half term with them instead of them coming to us. Both children (6 & 3) are endlessly active.
Three days during which we spent first, four hours walking round a National Trust property and playing in the grounds, followed the next day by three hours walking (climbing) around a castle followed by fully 6 hours walking around a Country park, which as well as the stately home, also had a bird 'zoo' and a fun fair. Followed by a 200 mile journey home in sluicing rain and taking an alternative (unknown) route part of the way home because of an accident on the motorway meant that on the fourth day, after I got home I was exhausted. Fortunately of the fifth day we had booked a spa day with out daughter to celebrate her 40th birthday, boy, did I enjoy that.
Now I am ready for the next visit!!??